The Duchess' pregnancy rumors are all over the internet, and some could not help but speculate what name will they pick for the future royal heir.

The name will be possibly connected to the namesakes of the royal blood-in-line, William, but that doesn't mean Catherine does not have a say on what she should name her child. Here are the top 5 picks that are most probably to be written on the royal heir's birth certificate:

1. Catherine Diana

If the future child of the Royal Couple is a girl, it could be possible that they will name their child after Kate's real name, followed by the name of Prince William's mother. "Catherine Diana" sounds just right for a future Queen, especially if she'll be raised by a very fashionable Duchess.

2. Charleston Will or Charleston William

Tweaking William's father's name and adding the Duke's nickname to it, "Charleston Will" or "Charleston William" are regal-sounding names for a male royal heir. The Duke will definitely be attached to his future son, and naming the child after William and his father will remind the Duke of his fatherly relationship with Prince Charles.

3. Elizabeth

It could be possible that the future heir will be named after the Queen. It is, after all, with her blessing that William was able to marry Kate. Also, "Elizabeth" is the Duchess' second name in birth, making it even more possible for the future heir to be given this name.

4. William Andrew

Naming the royal baby "William" might seem already obvious; but the "Andrew" might be a mystery to others. The Royal couple met in St. Andrews Academy, where they both took classes in art and geography, and even shared a flat together with friends. The name "Andrew" could be a part of the Royal Couple's list just because it reminds them of their early times as lovers.

5. Arthur Louis

The Duke's full name is William Arthur Philip Louis, and it is possible that the couple will lift some from William's four-name-precedence. Besides, the name "Arthur Louis" is befitting for a future King, sounding all-mighty and powerful.

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